package 工具类;

public class ArrayUtil {
    private ArrayUtil() {}

    public static String printArr(int []arr){
        StringBuilder sb=new StringBuilder();
        sb.append("[");
        for (int i = 0; i < arr.length; i++) {
            if(i== arr.length-1){
                sb.append(arr[i]);
            }else{
                sb.append(arr[i]).append(", ");
            }
        }
        sb.append("]");
        return sb.toString();
    }
    //平均分
    public static double getAverage(double arr[]){
        double sum=0;
        for (int i = 0; i < arr.length; i++) {
            sum+=arr[i];
        }
        return sum/ arr.length;
    }
}
